Lantern



(No Model.)

A. H. & J. T. CRAWFORD.

LANTERN.

No. 417,000. Patented Dec. 10, 1889.

; INVENTURSI ATTD H N EYS receptacle.

UNITED STATES PATENT OFFICE.

AMOS HERBERT ORAlVFORD AND JASPER T. ORAVFORD, OF LIVERPOOL,

- NElV YORK.

LANTERN.

SPECIFICATION forming part of Letters Patent N 0. 417,000, dated December 10, 1889. Application filed June 10, 1889. Serial No. 313,645. (No model.)

To all whom it may concern.-

Be it known that we, AMOS HERBERT CRAW- FORD and JASPER '1. CRAWFORD, of Liverpool, in the county of Onondaga, in the State of New York, have invented a new and useful Improvement in Lanterns, of which the fol- ,lowin taken in connection with the accompanying drawings, is a full, clear, and exact description.

The chief object of this invention is to guard against excessively filling lamps and other receptacles with oil or other fluid; and to that end the invention consists in the combination, with a fluid-receptacle, of a capillary tube communicating with the interior of said receptacle and extending above the same, as hereinafter fully described, and specifically set forth in the claims. I

The oil rising from the oil-receptacle of the lamp in the capillary-tube, and being visible therein from the exterior thereof, serves as a safeguard against excessively filling the aforesaid receptacle.

In the annexed drawings, Figure l is a side elevation of a lantern equipped with our improved safety-gage, which latter is more fully illustrated by the breaking away of a section of the lamp. Fi 2 illustrates a modification of our invention. Fig. 3 is a top plan View of the gage, and Fig. 4 is an enlarged detail view of the gage.

Similar letters of reference indicate corresponding parts.

A represents the lamp or 'oilreceptacle of a lantern, provided with the usual screwcapped inlet a on its top.

0 denotes our improved safety-gage, con sisting of a glass tube or other suitable transparent or translucent tube, which we insert by one of its ends into the receptacle A, so as to communicate with the interior thereof and extend with its opposite end above said The oil ascending by capillary attraction in the tube 0, and being always higher therein than in the receptacle A, and visible from the exterior of the tube, enables a person to ascertain when the lamp is properly filled. \Ve preferably insert the said tube through a suitable packing or stuffing box I), secured in the top plate of the re ceptacle A, and protect the external portion of said tube by a suitable guard e surrounding the same and leaving the side which faces outward from the lantern exposed to view. A'plate d (best seen in Fig. 3 of the drawings) may be erected at the opposite side or rear of the tube and marked to indicate the height of the oil in the receptacle A by the column of oil in the gage-tube O. Although the said tube will answer the purpose of our invention without further appliances, yet, in order to increase its efficiency and render it more reliable, we prefer in some instances to employ an auxiliary capillary tube or conductor 0 inside of the main capillary tube O, with sufficient space between them to allow the oil or fluid to ascend in both of said tubes, as illustrated in Fig. at of the drawings, and with some oils or fluids it may be advisable to form the auxiliary tube 0 of colored glass, or in lieu of the latter tube a wire may be employed.

To guard against evaporation and spilling of the oil through the tube, we prefer to connect to the upper end of the aforesaid tube a return-tube a, which may consist either of an extension of the tube 0 or formed separatelyand of other material-such as brasswhich return-tube terminates inside of the receptacle, and preferably directly under the top plate thereof, as shown in Fig. 1 of the drawings.

Having described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. The combination, with a fluid-receptacle, of a safety-gage consisting of a capillary tube communicating with the interior of said receptacle and extending above the same, as set forth.

2. The combination, with a fluid-receptacle, of the main capillary tube O and auxiliary capillary conductor 0 inside of the aforesaid tube and both communicating with the interior of the receptacle and extending above the same, substantially as described and shown.

AMOS HERBERT ORAXVFORD. JASPER T. ORAW'FOR-ll. Witnesses:

MARK W. DEWEY, H. M. SEAMANs. 

